制备工艺对聚磷酸铵微胶囊性能的影响.pdf

第43卷第9期
塑料工业
2015年9月
CHINA PLASTICS INDUSTRY
95
動剂制备工艺对聚礫酸铵徽胶囊性能的影响
胡拉',吕少ー,傅峰“,陈志林,黄景达,王思群
(1.中国林科院木材工业研究所,国家林业局木材科学与技术重点实验室,北京10001;
2.美国田纳西大学再生碳中心,诺克斯维尔37996-4570)
摘要:以聚乙二醇改性三聚氰胺一甲醛树脂为壁材、聚磷酸铵(APP)为芯材,通过原位聚合法成功制备了“
元一体”膨胀型阻燃微胶,重点研究了pH值、反应温度及反应时间对微胶囊产率、吸湿性、热稳定性和成炭性能
的影响。结果表明,随着pH值的降低、反应温度的升高或反应时间的延长,预聚物分子缩聚速度加快,聚磷酸铵徵
胶囊( MCAPP)产率和壁材含量还渐增加;随着pH值的降低或反应温度的升高, MCAPP壁材结构趋于疏松,吸湿
增重率变大,而反应时间对吸湿性没有明显影响;300℃以内工艺条件对MCAP分解率没有明显影响,400℃时
MCAPP壁材含量越高,分解率较高,热稳定性较差; MCAPP的热解残重时间的延长而逐渐增大,随着pH值的降
低或温度的升高呈现先上升后下降的变化趋勢。
关键词:聚磷酸铵;微胶囊;工艺条件;膨胀型阻燃剂
DOI:10.3969/j.issn.1005-5770.2015.09.023
中图分类号:TQ314.24*8
文献标识码:A
文章编号:1005-5770(2015)09-0095-04
Effects of Operating Parameters on Properties of Microencapsulated
Ammonium Polyphosphate
HU La, LV Shao-yi, FU Feng, CHEN Zhi-lin HUANG Jing-da', WANG Si-qun
(1. Research Institute of Wood Industry, Chinese Academy of Forestry, Key Laboratory of Wood Science and Technology
of State Forestry Administration, Beijing 100091, China
2. Center for Renewable Carbon, University of Tennessee, Knoxville 37996-4570, USA)
Abstract: Integrated intumescent fire retardant was prepared by in-situ polymerization with melamine
formaldehyde resin modified by polyethylene glycol as wall-material and microencapsulating ammonium
polyphosphate (APP) as core material. The effects of PH value, reaction temperature and reaction time on
the yield, hygroscopicity, thermal stability and char formation of Al
apsules (MCAPP) were
investigated respectively. The results showed that the yield and shell content of MCAPP increased with PH
value drop, temperature rise or time extension due to the rapider condensation of prepolymers. The moisture
absorption of MAPP ascended with PH value drop or temperature rise for the decrease of compactness of the
shell, while it displayed little variation following time extension. Although the operating parameters had no
obvious effects on pyrolytic mass fraction of MCAPP when temperature below 300C, MCAPP with higher
shell content showed larger pyrolytic mass fraction and thus worse thermal stability at 400 C. The residual
mass fraction gradually rose with time extension, while it increased first but then declined with PH value drop
or temperature rise
Keyword Ammonium ol o phate; Mcrocapsule; Operating Parameters Intumesent Fire Retardant
随着阻燃剂无卤化受到人们日益重视,膨胀型阻聚合物相容性较差,成为其应用的一大障碍。近
燃剂(IFR)成为一类非常重要的环保型阻燃剂?。年来,利用微胶囊技术在阻燃剂表面形成一层致密的
IFR通常由酸源、炭源和气源三种组分构成。其中聚壁材,成为提高传统IR稳定性及改善其与基体相容
磷酸铵(APP)等常用组分具有一定的吸湿性,且与性的有效途径?。
*国家高技术研究发展计划(863计划)项目(2010AA101704
**联系人feng@ca,ac.cn
作者简介:胡拉,男,1988年生,在读博士研究生,主要从事木质功能材料的研究。hula06291001@163.com